Family movie album



Sept. 5, 1944. G. w. HARTwlG FAMILY MOVIE ALBUM Filed Dec. l5, 1941 2 Sheets-Sheet l INVENTOR GEORGE WHARTWIG TTORNEYS Sept. 5, 1944.

INVENTOR GEORGE WHARTWIG A ,BY

ATTORNEYS Patented Sept. 5, 1944` FAMILY MOVIE ALBUM George W. Hartwig, Milwaukee, Wis., assigner of one-half to 'George Neumann, Milwaukee,

Wis.

Application December 13, 1941, Serial No. 422,848

(Cl. ESS-18.7)

1 Claim.

My invention has for its objects to provide a simple, economical and low priced moving picture projector, a portable article particularly for household use, wherein the casing or shell containing the entire equipment is comparatively small in size, whereby it may be conveniently handled by the user to view a series of pictures which are thrown upon a ground glass sheet aiiixed to the front of the projector casing.

Applicant has in view, in a broad sense, to provide what might be termed a moving picture album, which may be conveniently picked up and put into motion by pressing a button. For example, the individual family pictures may be conveniently viewed from time to time, it being un derstood that a strip of film carrying the pictures is of the endless belt type whereby said pictures are continuously thrown upon the ground glass sheet.

In view of the fact that this article must be quite compact, it is contemplated to utilize an endless film strip approximately 100 feet in length, although this length may be indenitely varied. For example, the owner of the article may from time to time produce or have produced for his particular use, a new endlessband of pictures which can be readily substituted for the original band. Hence, the family history can from time to time be preserved in a series of endless band moving pictures.

With the above objects in view, my invention consists in certain pecularities of construction and combination of parts l'as will be hereinafter fully set forth with reference to the accompanying drawings and subsequently claimed.

In the drawings,

Figure 1 repreents a sectional elevation of a portable projector article embodyingr the features of my invention. The section being indicated by line l--I of Figure 2.

Figure 2 is a plan sectional View of the same, the section being indicated by line 2 2 of Figure 1.

Figure 3 is a cross section of the moving picture casing illustrating the general arrangement of the guides for the lm strip and exposure window of the lamp jacket. y

Figure 4 is a perspective View of the device looking towards the front end of same carrying the picture plate.

Referring by characters to the drawings, l indicates a casing or housing having a front view opening which is closed by an adjustable ground glass sheet of pre-determined size upon the back face of which the pictures are reflected.

Alined with the picture plate and spaced rearwardly the proper distance therefrom, is a focusing lens 3, carried by a shell d, secured to the bottom of the casing. The rear wall of the shell 4 is mounted in juxtaposed position to the front wall 6 of a lamp jacket 6', the said front wall being provided with a light aperture l, which is alined with the light aperture 5, and the slight space between the juxtaposed walls 5 and 6 is adapted to receive the nlm strip 8, which strip travels through this channel or space at a predetermined speed whereby the pictures thereon are thrown upon the screen or ground plate glass 2, by means of a light bulb 9, which is mounted in the jacket 6'.

The iilm strip 8, is of the endless type and is guided through the space between the walls oi the shell 4 and jacket by flanged rollers J,

The film strip, as it passes into the cha nel bei tween the walls of the jacket and housing, is guided by iingers Il, Il.

The rollers l0 and i together with the jacket 6 are mounted upon a bracket secured to the base of the housing, which bracket also carries a spring controlled guide roller i3, or the back-leg 8' of the nlm strip, whereby slack is taken up therein.

The feed-leg of the nlm strip is spirally wound upon the core of a fixed reel hub i4 and said first coil is trained overa series of peripheral antifriction rollers l5, which rollers are carried by the reel core. The reel hub is ixedly secured to a side wall or the casing by a shank i6 and aise exte j@ ing from the hub is a plurality of spider arms i'. which carry anti-friction rollers i8, the same being disposed at a slight angle and adapted to guide the nested coils |53 of the endless iirn strip.

As best shown in Figure 2 ci the drawings, the nested coil is disposed at an angle to the axis of the reel core and it is also guided and confined at said angular position by companion rollers 23 carried by a corresponding spider 2l, which is detachably mounted upon a head 22 extending from said hub.

In order to remove the coiled endless film strip from the reel hub when it is desired to replace said strip with a new series of pictures, the spider 2| is removed by manipulating the locking bolt 2| and owing to the fact that a side wall l of the housing or casing is detachable, these parts can be readily manipulated whereby the new endless film strip is inserted.

As best shown in Figures l and 3 of the drawings, the roller I0 is provided with the usual companion sets of teeth for meshed engagement with marginal apertures A8" of the lm strip 8.

The roller IB also carries a driving pulley 23,

adapted to receive an endless driving belt 2li,Y

which is trained over a pulley constituting part of an electric motor 25, that is secured to the base of the casing.

It is also apparent that the electric feed wires to the lamp 9, and motor, form a flexible cord 26, which passes through the casing, and an electric switch, not shown, is controlled by a button 2l projecting from the removable side Wall l', of the casing.

From the foregoing description, it will be noted e that the feed-leg of the lm strip is Wound upon the hub reel in a single offset turn and thereafter Y the coil of winding i9, being angularly oiset from the initial winding, will permit this belt of endless film strip to be unwound from the core to form the feed-leg 8 and sirnultaneouslyrwith this unwinding the back-leg ofthe lrn strip will be coiled in a compact nest at an angle to the first mentioned single coil, whereby the strip as a whole, irrespective of its length, may be continuously moved past the exposure openings or windows, to reflect a series of magnified pictures upon the transparent sheet 2.

Coincident to this action of the strip, the backleg 8 will continually form the outer winding of the nested group, which group is heldin its angular position by companion guide rollers. Hence, the party desiring to viewthe pictures will' simply pick the light, encased instrument from its point of rest and by pressing the button 21, may casually view the entire group of pictures contained on this strip in the same manner as the pictures in a family album` would be viewed. .Y

It is manifest that the motive power may be in the form'of a spring or manual rotation and may be imparted by a speeded up core train.

It is understood that the mechanism for controlling the lm strip is provided with the usual intermittent feed, jand it is also contemplated to adjust the ground glass plate back and forth to vary the distance between the lens 3, andsaid plate.

While I have shown and Vdescribed a simple exemplication of my invention minutely as to spirally wound coil of film strip obliquely disposed with reference to the hub and guided Yby the spider rollers, the inner convolution ofthe Vstrip extending obliquely Vfrom the hub forming a loop with the outer convolution of said coil, whereby the strip is fed from the inner convolution of the coil to the outer convolution of said coil.-

GEORGE w. HARTWIG; 

